Seiko Cal. 3872 - 480

This Spring Drive model from 1974 features a 40mm PVD Black case. Powered by the 3872 caliber with 20j jewels beating at 36,000 bph, it delivers a 43 hours power reserve. [seikata-wm-c88e5f8483d5]

Also known as: Sportsmatic, Bellmatic

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

9.1mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1974

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